Locomotive with steam-turbine drive.



No..855,436. PATENTED MAY 28, 1907.

J. STUMPF.

LOUOMOTIVE WITH STEAM TURBINE DRIVE.

APPLICATION FILED 0016, 1904i UNITED STATES PATENT FFICE.

JOHANN STUMPF, OFCHARLOTTENBURG, GERMANY.

LOCOMOTIVEIIWITH STEAM-TURBINE news.

- Spegification of Letters Patent.

Patented MayJBS, 1907.

J Application flllidOotober a. 1904. SerialNo. 227,367;

To all whom it may concern:

Beit known that 1,,JOHANN .S'TUMPF, a SllbJBOtOf the German Emperor, residing at Charlottenburg, near Berlin; in the Empire of Germany, have invented certain'new and useful Improvements in Locomotives with Steam-Turbine Drive, of which the following is a specification. r p I The resent invention enables locomotives to be tted with steam-turbine drive, without the necessity for having gear-wheels between the turbine and the driving wheels of the locomotive.

As is well-known the chief diflicultyhith-' erto in' the way of driving locomotives b turbines has been 'the fact that the hig boiler pressure at. comparatively low rate ofthe present invention 'the I difwheels available, and the-steps in the steam bine, or several turbines working in arallel,

ressure can therefore be made six in num er. Whereas, so far, the proposalshave been mostly directed tothe application of one turin which the unavoidably high spee was reduced to thespeed of the locomotive-wheels by means of caring, in the fpresentinvention the s cc reduction is e ected by subdivision 0 the steam pressure for each drivwheelj In contrast therefore to-the first case it is now not only necessary to choose driving wheels of not toolarge diameter, but

possible-driving wheels. p

In the practical carrying out of the inventiona st 1 further number ofsteps in the pressure can be used by having on the shafts of the se arate turbines several blade rims which utilize the steam of the individual steps in a proportionate number of steam speeds. Several pressure steps can also be arranged for one subsidiary drive.

The" example shown in the "drawing repre-' sentsr'a locomotive with three axles,

up the steam it is really an advantage to have the smallest 1' but theprinci le is equally applicable-to lo comotives wit a greater or smaller number of driving axles. Y

Figure 1 shows the arrangement inelevation; Fig. 2 in plan, for a three-axle locomotive, and Fig. 3 is a detail sectional view of a portion of one of the-turbines. b glhe Wheels on the axle a are shown marked On the same axle of each wheel is fitted a turbine which is shown marked c c c These turbines are'fixed on the frame of the locomotive and are-suitably coupled to the respective wheels. For in stance, the coupling-=may beeifected by 7 means of a flexible-crank arrangement whic will permit of the necessali play between the .turbmes rigidly fixed on t e frame work and the locomotive wheels driven by them. -;-The

first turbine 0 obtains its steam from the boiler through a pipe shown marked-d From the first turbine the, steam goes right 1 through-the connections d (1 of each of the turbine steps. Fromthe last-component turbine 0 a pipe d leads to the exhaustor blastpipe.

Referring to Fig. erepre'sents a'wheel one of the turbines having one or more .rows

of U-shaped or other buckets f carried on its peri hery. Suitably arranged" with respect to t e'buckets and supported by-the-wa l ef the steam chest or chamber 9, are nozzles 71.

which discharge steam orother elastic fluid against the buckets at the roper angle.

These nozzles may be and'pre erablyl are of the expanding type, as shown.

As mentioned already' the single turbine I steps can be divided further into subsidiary steps on the principle'of steam speed gradation, cach 0 the' subsidiary steps working on one shaft. It is also possible to havese .arate pressure steps working. in paral el where such an arran ement in a multi 1e driving-axle locomotive is feasible. he manner in which the turbines of the se arate steps are-brought to work on the whee s is of" f no 1111 ortance in the inven'tion,'the turbine, f itself or instancecan ,be arran ed on the axle.

of'the driving wheels, and it is also" ossible to have several pressur 3"eP K one driving wheeler one driving common on axle.

- 'lt'is to be noted as inthe 'resent 'rangement the driving wheels of t e locomotive are driven inde endently. For this reason the several tur ines or stages must be designed so as to drive the wheels synchro- ITO with substantially equal torque, and con duits for supplying elastic fluid to the turbines.

driving wheels mountedthereon, in combination with elastic fluid turbines directly connected to the ends of the axle, one constituting a high pressure and another a low pressure turbine operating simultaneously and driving in the same direction.

3. A locomotive comprising axles, and driving wheels mounted thereon, in combination with a plurality of elastic fluid turbines for each axle, said turbines being adapted to successively abstract energy from the motive fluid and designed and arranged to produce substantially the same torque at each wheel.

4. A locomotive comprising axles", and driving wheels mounted thereon, in combination with a plurality of elastic fluid turbines directly connected to each axle, and conduits connecting the turbines in series.

5. A locomotive comprising axles, driving wheels mounted thereon, and a frame supported on the axles, in combination with a high speed turbine adjacent each wheel and connected with its axle, and an independent.

casing for each turbine mounted= on the frame. .i

6. A locomotive comprising axles, driving.

wheels mounted on the ehdsof the axles, a

' turbine adjacent each wheel means for pass:

ing motive fluid in series through the turbines on one side of the locomotive and means for passing motive fluld in series 1n the opposite direction through the turbines on the other side of the locomotive so that the 4 5 pairs of driving wheels are uniformly driven by a pair of turbines connected with the axle of each pair of wheels and receiving motive fluid at different pressures.

, v "7.. A l'oeemotive comprising axles, andt so" 2. A locomotive comprising an axle, and

driving wheels mounted thereon, in combination with elastic fluid turbinesarranged one at each end of each axle, an(l coiidiiiftsfcorrf necting the turbines in series.

8. A locomotive comprising axles, and driving wheels'rnounted thereon, in combination with turbines for driving the wheels which are arranged inline with the axles and located adjacent to the outer sides offthe wheels.

- 6o 9. A locomotive comprising axles and wheels mounted thereon, a series of wheeldriving turbines on one side of the locomo tive, a series of wheel-driving turbines on the other side of the locomotive, conduits joining the turbines of each series,'and. a conduit joining the end of one series with the beginnin of the other to pass motive fluid in opposite directions through the two series of turbines. '70

In testimony, that I claim the foregoing as my invention I have signed-my name in presence of two witnesses, this twentythird day of September 1004.

7 JOHANN STUMPF. 'Vv itnesses v HENRY HASPER, WOLDEMAR HAUPT. 

